package com.security.tools;

import com.alibaba.fastjson.JSON;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.web.client.RestTemplate;

import java.lang.reflect.Field;
import java.util.List;
import java.util.TreeMap;

/**
 * RestTemplate 工具类
 * @author: author
 * @create: 2019-06-05 14:06
 **/
public class RestTemplateUtil {
 
    private static class SingletonRestTemplate {
        static final RestTemplate INSTANCE = new RestTemplate();
    }
 
    private RestTemplateUtil() {
    }
 
 
    public static RestTemplate getInstance() {
        return SingletonRestTemplate.INSTANCE;
    }
 
    /**
     * post 请求
     * @param url 请求路径
     * @param data body数据
     * @param token JWT所需的Token，不需要的可去掉
     * @return
     */
    public static String post(String url, String data, String token) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        if (token != null) {
            headers.add("Authorization", token);
        }
        HttpEntity<String> requestEntity = new HttpEntity<>(data, headers);
        return RestTemplateUtil.getInstance().postForObject(url, requestEntity, String.class);
    }
 
    /**
     * get 请求
     * @param url 请求路径
     * @param token JWT所需的Token，不需要的可去掉
     * @return
     */
    public static  String get(String url, String token) {
        HttpHeaders headers = new HttpHeaders();
        headers.add("Accept", "application/json");
        headers.add("Content-Encoding", "UTF-8");
        headers.add("Content-Type", "application/json; charset=UTF-8");
        if (token != null) {
            headers.add("Authorization", token);
        }
        HttpEntity<String> requestEntity = new HttpEntity<>(null, headers);
        ResponseEntity<String> response = RestTemplateUtil.getInstance().exchange(url, HttpMethod.GET, requestEntity, String.class);
        String responseBody = response.getBody();
        return responseBody;
    }

    /**
     * 将对象转成TreeMap,属性名为key,属性值为value
     * @param object    对象
     * @return
     * @throws IllegalAccessException
     */
    public static TreeMap<String, Object> objToMap(Object object)  {

        Class clazz = object.getClass();
        TreeMap<String, Object> treeMap = new TreeMap<>();

        while ( null != clazz.getSuperclass() ) {
            Field[] declaredFields1 = clazz.getDeclaredFields();

            for (Field field : declaredFields1) {
                String name = field.getName();

                // 获取原来的访问控制权限
                boolean accessFlag = field.isAccessible();
                // 修改访问控制权限
                field.setAccessible(true);
                Object value = null;
                try {
                    value = field.get(object);
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                }
                // 恢复访问控制权限
                field.setAccessible(accessFlag);

                if (null != value && StringUtils.isNotBlank(value.toString())) {
                    //如果是List,将List转换为json字符串
                    if (value instanceof List) {
                        value = JSON.toJSONString(value);
                    }
                    treeMap.put(name, value);
                }
            }

            clazz = clazz.getSuperclass();
        }
        return treeMap;
    }
}